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SVS Subwoofer Isolation feet. Will I lose bass?

Most of what I see about subwoofer isolation has to do with minimizing rattles or bothering the neighbors.  But what about a sealed subwoofer on a concrete slab?  Would these dampeners not "dampen" the bass as well?

My setup...  Dual SVS SB16s on a concrete slab.  I don't have a rattle problem and the room is 20ft tall so I can't afford to "lose" bass because of my shakey rubbery feet.  

I've read and seen many great things about these but I have a hunch it would hurt a sealed sub on a slab more than help.

dtximages
jetter
3,033 posts
 
OP, just to mention again, I believe the SVS feet are only $49 for a set of 4 (verify with them), with 45 day return period.  Shoot, for that little I would pull the trigger to see if it suits my fancy before investing in the high priced spread.
bdp24's avatar
bdp24
9,788 posts
 
Though 3 points do indeed define a plane, springs don’t care about that. They are more concerned with mass stabilization. I have found 4 springs to in general be much more stable than 3.
jollygreenaudiophile2's avatar
jollygreenaudiophile2
275 posts
 
Your "Nirvana" platform? Geesh! You name your platforms! That's a fair amount of mass per layer. I use about half that. But then' There is simply NO substitute for mass when it is needed. 
 Hm, Maybe I'll name my next one too. "Bob"? Hmmm. Chuck? maybe..
 
BDP? Have you tried "five"?
 I heard about a fellow out west, whom tried "Six", once. But there was some kind of accident.....
    
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geoffkait's avatar
geoffkait
23,365 posts
 
The Mana from U.K. employed a great many glass shelves. The more the better so they said. Nirvana dual layer platform is a product. Hence the naming of it. But everyone knew it as Nancy. Building more than two heavy mass-on-springs layers wouldn’t work. It would be very unstable. The idea is to construct one dual layer device the right way. Sub Hertz performance. Hel-loo!
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